Let us say there are two classes a1, b1 extending from different parent classes.
How to set the "change_value" field in class a1 from class b1
class a1 extends random_class;
bit[change_value -1:0] data;
..
..
endclass
class b1 extends check_class;
//what to do in class b1 to set the "change_value" in class a1
..
..
endclass
Please help in this context